CN100413222C - Method and system for determining target signal interference ratio of down link public channel power control - Google Patents
Method and system for determining target signal interference ratio of down link public channel power control Download PDFInfo
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Abstract
The present invention discloses a method and a system for producing the SIR target value of downlink open loop power control. The method comprises the following steps: a statistical step, information that whether the reception of the side information PDU of UE is right or not is counted and received from the state PDU indication of the UE by an RLC entity corresponding to at least one of logic channels DCCH and DTCH on a common transmission channel in RNC; an SIR target value obtaining step, the information that whether the reception of the side information PDU of UE is right or not is transmitted to an SIR target value tracking loop to obtain an SIR target value for the open loop power control of a down link.
Description
Technical field
The present invention relates to the method for downlink common channel power control in code division multiple access (CDMA) system.Definite method of target signal interference ratio (SIR) when more particularly, the present invention relates in downlink common channel, adopt the slow power control technology.
Background technology
Code division multiple access (CDMA) system is a typical interference limiting system, and any one user's available power all will become the interference to other users.Therefore, power control techniques has obtained using widely in cdma system as a kind of important means that reduce interchannel interference.Power control is divided into closed power control and open Loop Power control two big classes according to the difference of control mode.Wherein, closed power control be by receiving terminal to received signal interference ratio (SIR) compare with its desired value, and consequent power control command is postbacked sending end by reverse link feedback carry out power control, therefore be only applicable to exist the dedicated channel of bidirectional wireless link; Open Loop Power control does not need two-way channel, and it directly controls its transmitting power by transmitting terminal according to certain strategy, and to only there being the common type channel of one way link, its power control can only be undertaken by open loop approach.Compare with closed power control, the control speed and the control precision of open Loop Power control are all lower.
In Wideband Code Division Multiple Access (WCDMA) (WCDMA) system of 3GPP, the down physical channel that has multiple common type is as Common Pilot Channel (CPICH), synchronizing channel (SCH), first Common Control Physical Channel (P-CCPCH), S-CCPCH Secondary Common Control Physical Channel (S-CCPCH), Page Indication Channel (PICH), Acquisition Indicator Channel (AICH) etc.Wherein, except S-CCPCH, the power of each down public common is with network planning parameter correlations such as the capacity of sub-district and coverings, is generally determined by network planning process and launches with relatively-stationary power level.
S-CCPCH is used to carry forward access channel (FACH) and two kinds of transmission channels of paging channel (PCH), and it both can carry FACH or PCH separately, also can multiplexing these two kinds of transmission channels of while.Wherein, PCH is used to carry logic channel PCCH (Paging Control Channel), and FACH is used to carry Broadcast Control Channel (BCCH), Common Control Channel (CCCH), CTCH Common Traffic Channel (CTCH), Dedicated Control Channel (DCCH), Dedicated Traffic Channel multiple logic channels such as (DTCH).Detailed description about these channels and multiplex mode thereof, can be with reference to standard 3GPP TS 25.211,3GPP TS 25.321, the documents such as 3GPP TS 25.301,3GPP TS25.302 of 3GPP, about the usage of S-CCPCH, can be with reference to documents such as standard TS 25.331, the TS 25.302 of 3GPP, TS 25.304.
In the logic channel that FACH carried of S-CCPCH carrying, DTCH and DCCH exist only in the CELL_FACH state of connection mode (RRCConnected Mode) of radio resource control layer (RRC).A FACH may carry the DTCH and the DCCH logic channel of different user devices (UE), and different users is distinguished in the UE-ID territory of medium access control (MAC) head by the FACH channel.Wherein, DCCH is used to carry the RRC signaling that the RRC that is under the CELL_FACH state connects the UE that activates, and DTCH then is used to carry the user data of small data quantity.About the detailed description of RRC signaling and different mode and state, can be with reference to standard TS 25.331 documents of 3GPP.
Need distribute a pair of DPCH to compare for a RRC is connected with radio network controller (RNC) under the CELL_DCH state, the down link of a plurality of UE under the CELL_FACH state can S-CCPCH of time-sharing multiplex, up link is then by Random Access Channel (RACH) transmission data or signaling, therefore, adopt the RRC of CELL_FACH state to connect to reduce to the taking of finite wireless resources, thereby effectively improve power system capacity.In radio resource manager (RRM) strategy, only need send the UE of low volume data to those upper and lower provisional capitals, enter the CELL_FACH state by controlling it, rather than the CELL_DCH state, improve utilization ratio of wireless resources.
Yet, if S-CCPCH is not carried out suitable power control, can both correctly receive in order to make all users in the sub-district, all S-CCPCH can only send with sufficiently high relatively-stationary power simply, to guarantee the covering to whole sub-district.Like this, after the UE that is in the CELL_FACH state reaches certain quantity, consequent interference will influence systematic function significantly, transmit the benefit of bringing thereby offset owing to adopt RACH/FACH to carry out small data quantity.
Therefore, have only S-CCPCH is taked the certain power control measure, could effectively improve down-link performance.As previously mentioned, S-CCPCH is the channel of common type, does not have corresponding dedicated uplink channels, therefore, can only adopt the mode of open Loop Power control, realizes power control at a slow speed.A kind of method of carrying out slow power control at the DCCH and the DTCH of FACH carrying has been proposed in No. the 02143793.9th, the Chinese patent application that is entitled as " downlink common channel open-loop power control method in the code division multiple access system ".
In the enforcement of this method, require to set up a corresponding SIR track loop for each is in the UE that CELL_FACH state and DCCH/DTCH have set up, the external power control loop in this SIR track loop and the closed power control is similar.Fig. 1 has provided the structured flowchart of a typical SIR track loop.In order to follow the tracks of the current required SIR of UE, UE should be on the up DCCH of RACH carrying, with DCCH on the FACH that receives and the quality of reception measured value of DTCH, report RNC by the RRC measurement report, RNC is then with the input of this quality of reception measured value as the SIR track loop, thereby obtains the current required SIR of UE.Wherein, UE typically is exactly transmission block error rate (BLER) to the measured value of the quality of reception of DCCH on the FACH and DTCH.
But in current WCDMA standard, the measurement report of UE is not still supported the measurement of down link BLER.Therefore, in order in current WCDMA system, effectively to implement the downlink common channel open-loop power control method, need to solve the problem of the needed target SIR of DCCH/DTCH of the particular UE that obtains the FACH carrying based on current WCDMA standard.
Summary of the invention
The present invention is just at the problems referred to above, proposed a kind of based on current WCDMA standard in downlink common channel, adopt the slow power control technology time target signal interference ratio (SIR) production method and system.
The method according to this invention comprises the steps: a statistic procedure, in RNC, what statistics was carried on logic channel DCCH on the Common transport channel and DTCH at least one corresponding RLC entity receives in the two receives the information of correctness from the status PDU indication of UE about UE side data PDU; And a sir target value acquisition step, described information about UE side data PDU reception correctness is sent into a sir target value trace loop, to obtain the sir target value.
System according to the present invention comprises: a statistic device, be arranged in RNC, be used for adding up that the two at least one corresponding RLC entity of the logic channel DCCH that is carried on the Common transport channel and DTCH receives from the status PDU indication of UE receives the information of correctness about UE side data PDU; And a sir target value trace loop, export the sir target value that is used for the down link open Loop Power control according to described information about UE side data PDU reception correctness.
In the present invention, both can add up the information that UE side data PDU receives correctness at the logic channel DCCH and the DTCH that are carried on the Common transport channel simultaneously, also can only carry out described statistics at one among DTCH or the DCCH.Should be appreciated that in order to improve the order of accuarcy of statistics, preferably simultaneously DTCH and DCCH are added up.
It is to be noted, receive the information of correctness about UE side data PDU, a preferred embodiment of the invention, be meant the data PDU number of data PDU number that the UE mistake receives and total transmission, and, be meant the number correct reception of UE and the data PDU mistake reception according to another kind of preferred implementation of the present invention.
Description of drawings
Read detailed description of the present invention in conjunction with the drawings, relevant above-mentioned advantage of the present invention and other advantages will become clearer, clear and definite.In the accompanying drawings:
Fig. 1 is the block diagram of typical SIR track loop;
Fig. 2 is the schematic diagram of radio interface protocol architecture;
Fig. 3 is the schematic diagram of RLC peer layer relation under the affirmation mode;
Fig. 4 is the schematic diagram of RLC data protocol data cell structure under the affirmation mode;
Fig. 5 is the schematic diagram of RLC status protocol data cell structure under the affirmation mode;
Fig. 6 is the flow chart according to sir target value production method of the present invention;
Fig. 7 is the block diagram that produces system according to sir target value of the present invention;
Fig. 8 is the sir target value production method of a preferred embodiment of the invention; And
Fig. 9 is the sir target value production method according to another kind of preferred implementation of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing preferred implementation of the present invention is described.
In order more clearly to set forth the present invention, at first the radio interface protocol architecture of WCDMA is illustrated here.As shown in Figure 2, in the WCDMA Radio interface protocols, that be positioned at bottom is physical layer (PHY), on be respectively media access control layer (MAC) and wireless chain control layer (RLC), Radio Resource control (RRC) layer is responsible for the control to these protocol layers.The channel of MAC layer and PHY interlayer is a transmission channel, and the channel between MAC layer and the rlc layer is a logic channel.To a specific UE, may there be a plurality of RLC entities, the RLC entity that the logic channel that promptly this UE is different is corresponding different respectively.
In WCDMA, rlc layer is supported three kinds of patterns: transparent mode (TM), Unacknowledged Mode (UM) and affirmation mode (AM).Wherein TM pattern and UM pattern are mainly used in the relatively more responsive real time business of time delay, and the AM pattern is mainly used in the non real-time packet type business of transmission.Fig. 3 has provided the schematic diagram of RLC peer layer under the affirmation mode, can see by Fig. 3, the RLC of an AM pattern (AM-RLC) entity comprises the function that sends and receive two parts, the AM-RLC entity can send Query Information to the AM-RLC of equity entity, and the AM-RLC entity of equity is then replied.Figure 4 shows that the structure of AM pattern RLC data protocol data cell (data PDU).The specific definition in each territory among the relevant figure can be with reference to the standard TS5.322 of 3GPP.In Fig. 4, territory " P " represents poll bits, and when this bit was 1, the status report of the receiving terminal of expression request RLC peer layer was the status report that the receiving terminal of RLC peer layer is not asked in 0 expression.When the receiving terminal of RLC peer layer is received the data PDU of P=1, promptly replied by transmit status PDU.
In WCDMA, defined the mode of multiple triggering transmitting terminal starting state inquiry and the mode of multiple triggering receiving terminal transmit status PDU, use the combination of any mode or multiple mode in practice, depend on concrete implementation; And specifically use which kind of mode to not influence of enforcement of the present invention.About the detailed description and methods for using them of these modes, can be with reference to documents such as the standard TS5.322 of 3GPP and the document TSG-R2-99253 of working group.Wherein, inquire about based on certain polling interval time, or based on the mode that starts inquiry after the data PDU of each transmission some, it is mode than status poll commonly used, and based on the mode that the status poll to transmitting terminal responds, be that receiving terminal triggers status PDU transmission mode commonly used.
Figure 5 shows that the structure of RLC status protocol data cell (status PDU) under the AM pattern, the specific definition in each territory among the relevant figure can be with reference to the standard TS5.322 of 3GPP, and status PDU is used to report the state of the AM pattern RLC entity of two equities.As shown in Figure 5, status PDU is made up of one or more super territories (SUFI), defined the polytype of SUFI among the WCDMA, SUFI type related to the present invention has four kinds of ACK, LIST, BITMAP, Rlist, wherein ACK type SUFI comprises a sequence number, is illustrated in this sequence number PDU before and all correctly receives.LIST, BITMAP and Rlist type (being referred to as the NACK type at this) SUFI then indicates the sequence number that wrong data PDU takes place to receive by different expression modes.Under the AM pattern, in a single day transmitting terminal receives the sequence number of the misdata PDU that NACK type SUFI is indicated, will transmit these wrong data PDU again, and therefore, the RLC of AM pattern has the function of automatic repeat requests (ARQ).
As previously mentioned, S-CCPCH can carry FACH and two kinds of transmission channels of PCH, wherein, and PCH carrying logic channel PCCH, multiple logic channels such as reusable BCCH, CCCH, CTCH, DCCH, DTCH then on the FACH.As Common transport channel, FACH can carry the logic channel DTCH and the DCCH of different UEs, and all are carried on DTCH and the corresponding respectively RLC entity of DCCH of the different UEs on the FACH.According to 3GPP standard TS25.331, be carried on the RLC that RRC signaling on the DCCH all adopts the AM pattern, and loaded service on DTCH/FACH usually is the data service of non real-time, data service is that time delay is insensitive but to the business of mistake sensitivity, therefore generally all adopt the RLC of AM pattern.Therefore, based on above-mentioned analysis, sir target value production method that is used for the control of downlink common channel slow power that the present invention proposes and system are based on the ARQ function of RLC under the AM pattern.
Fig. 6 shows the overview flow chart according to the inventive method.At first, in step S61, in RNC, what statistics was carried on that the RLC entity of logic channel DCCH on the Common transport channel and/or DTCH correspondence receives receives the information of correctness from the status PDU indication of UE about UE side data PDU.Next, in step S62, the output result of the DTCH of same UE and/or DCCH is sent to a sir target value trace loop, produces the sir target value that is used for the control of downlink common channel slow power according to predetermined sir target value trace mode by it.
Definite method according to sir target value of the present invention can be realized by system shown in Figure 7.As shown in Figure 7, in RNC,, add up the information about UE side data PDU reception correctness of indicating by a statistic device 71 from the status PDU of UE for the logic channel DCCH and/or the DTCH that are carried on the Common transport channel.The value that statistic device 71 statistics obtain is admitted to sir target value trace loop 72, and the sir target value trace mode predetermined with basis obtains the sir target value, thereby realizes slow power control.Those skilled in the art are to be understood that, connection on connection shown in Fig. 7 presentation logic, and described each device both can be realized with hardware mode by discrete component, also can cooperate with the software mode realization with parts such as outside memory, input/output devices, can also realize in the mode that hardware or software combine by make it to processor programming.
Below, with reference to Fig. 8 first preferred implementation of the present invention is described.
As shown in Figure 8, in RNC, for the logic channel DCCH and the DTCH that are carried on the Common transport channel,, add up the data PDU number that the mistake from the status PDU indication of UE that received by the RLC entity of described DCCH and DTCH correspondence receives respectively at step S81 and S82.Here, control by RNC side RRC, the RLC entity transmitting terminal of RNC side can adopt based on certain polling interval time and inquire about, or carrying out status poll based on the mode that starts inquiry after the data PDU of each transmission some, the RLC entity receiving terminal of the UE side of equity then can be set to trigger based on the mode that the status poll to transmitting terminal responds the transmission of status PDU.But which kind of triggers the mode of transmitting terminal starting state inquiry and the mode of which kind of triggering receiver section transmit status PDU to it will be appreciated by those skilled in the art that concrete employing, depends on concrete implementation, and does not influence enforcement of the present invention.
Because DCCH and the DTCH of same UE have close aimed quality demand, therefore in step S83, merge device above-mentioned statistics is merged by one.If in certain time interval Δ T, the number of the data PDU of the DCCH/DTCH of total this UE that passes through the FACH transmission is N, the number of the data PDU that total mistake receives in the Δ T that is added up is M, then can obtain current block error rate BLER (k) according to following formula in step S84 and be:
BLER(k)＝M/N (1)
The estimated value BLER of BLER after then popin is slided after filtration
Ave(k) be:
BLER
ave(k)＝a·BLER
ave(k-1)+(1-a)·BLER(k) (2)
Wherein, a is the smoothing filter coefficient, can select optimum value by experience or actual test result, and the span of a is between 0-1.
Should illustrate that the data PDU of total transmission should comprise the data PDU of re-transmission, and the wrong data PDU that receives should comprise the data PDU of the re-transmission that still goes wrong.In addition, Δ T answers long enough, reaches enough accuracy with the estimation that guarantees BLER, but the long tracking performance that can influence target SIR.
In step S85, measured value with the BLER that utilizes said method to obtain, be input to a sir target value trace loop (typical sir target value trace loop as shown in Figure 1), be about to the BLER value of measurement and known BLER desired value and compare, and comparative result is passed through certain mapping function.Should be appreciated that described mapping function can be the mapping function that any known being used to obtains the target SIR value, specifically adopt which kind of mapping function not influence of enforcement of the present invention.Then, in step S86, produce the sir target value that is used for the control of downlink common channel slow power.
Followingly second preferred implementation of the present invention is described with reference to Fig. 9.
As shown in Figure 9, in RNC, for the logic channel DCCH and the DTCH that are carried on the Common transport channel, in step S91 and S92, the correct and wrong data PDU number that receives of adding up respectively that the RLC entity of described DCCH and DTCH correspondence receives from the status PDU indication of UE.Here, control by RNC side RRC, the RLC entity transmitting terminal of RNC side can adopt based on certain polling interval time and inquire about, or carrying out status poll based on the mode that starts inquiry after the data PDU of each transmission some, the RLC entity receiving terminal of the UE side of equity then can be set to trigger based on the mode that the status poll to transmitting terminal responds the transmission of status PDU.Which kind of triggers the mode of transmitting terminal starting state inquiry and the mode of which kind of triggering receiving terminal transmit status PDU to it will be appreciated by those skilled in the art that concrete employing, depends on concrete implementation, and does not influence enforcement of the present invention.
Then, the output result of the DTCH of same UE and DCCH all delivers to sir target value trace loop in step S93.Sir target value trace loop can adopt and the identical structure of exterior ring power control, as exemplary example, can adopt the employed exterior ring power control algolithm of document " OnSetting Reverse Link Target SIR in a CDMA System; Proceedings of VTC ' 97, May 1997, Vol.2; pp.929-933; by A.Sampath, P.Kumar and J.Holtzman ", promptly required sir target value SIR
Targe(k+1) be:
In the formula, δ is that loop is adjusted step-length, and K can be determined by target BLER:
In exterior ring power control, q in the formula (3)
kBe the whether correct amount of this transmission block of indication of deriving by the cyclic redundancy check (CRC) code (CRC) of MAC layer transmission block, and in the present invention, q
kBy the logic channel DCCH of same UE and the RLC entity of DTCH correspondence the correct and wrong data PDU number that receives that each status PDU analysis obtains is derived.Promptly when status PDU indication has a data PDU correctly to be received, q
kBe taken as-1, when the status PDU indication has a data PDU correctly not received, q
kBe taken as+1, like this, utilize the SIR tracking loop that has same structure with exterior ring power control, promptly can obtain being used for the sir target value of downlink common channel slow power control.But it will be appreciated by those skilled in the art that and also can use other modes to obtain described sir target value, specifically adopt which kind of mode not influence of enforcement of the present invention.
At step S94, output sir target value is to be used for the slow power control of down link.
The above different modes that obtains the target SIR value of open Loop Power control of having described in conjunction with preferred implementation of the present invention.Wherein, according to one embodiment of the present invention, the data PDU number that the mistake that the status PDU from UE that at first the RLC entity of statistics DCCH and DTCH correspondence receives in the certain hour section is indicated receives, calculate the BLER value according to method of the present invention then, obtain the sir target value by sir target value trace loop again.By contrast, way according to another embodiment of the invention is, the data PDU number correct and that mistake receives that the status PDU from UE that direct RLC entity with DCCH and DTCH correspondence receives is indicated is sent into sir target value trace loop and is obtained the sir target value, therefore, this execution mode does not experience the process of calculating the BLER value.
Abovely preferred implementation of the present invention is illustrated in conjunction with the WCDMA system, but those skilled in the art are to be understood that, the present invention is not only applicable to the WCDMA system, be applicable to that also any other need carry out the downlink common channel system of open Loop Power control at a slow speed, as IS-95, cdma200 and TD-SCDMA system.
Above-mentioned description of the preferred embodiment of the present invention is the order in order to illustrate just, should not be construed as any limitation of the invention.The present invention can adopt the form of software, hardware or the two combination to realize.Those skilled in the art can obtain about any distortion of the present invention and improvement according to foregoing description, but these distortion and improvement all are included in the scope and spirit of the present invention defined in the claims of enclosing.
Claims (14)
1. the signal interference ratio sir target value production method of a downlink common channel open Loop Power control, this method comprises the steps:
A statistic procedure, in radio network controller (RNC), statistics is carried on logic channel on the Common transport channel: at least one corresponding wireless chain control layer RLC entity receives in the two from the status protocol data cell PDU indication of user equipment (UE) receives the information of correctness about UE side data PDU for Dedicated Control Channel DCCH and Dedicated Traffic Channel DTCH; And
A sir target value obtains step, described information about UE side data PDU reception correctness is sent into a sir target value trace loop, to obtain to be used for the sir target value of down link open Loop Power control.
2. method according to claim 1, wherein said statistic procedure comprises the steps:
The number of the data PDU that the UE mistake from the status PDU indication of UE of adding up described DCCH and DTCH at least one corresponding RLC entity receiving in a period of time in the two receives; And
The data PDU number that the UE mistake that obtains with described statistics receives and in the described time period described DCCH and DTCH in the two at least one total data PDU number that sends as information about UE side data PDU reception correctness.
3. method according to claim 2 also comprises a combining step, is used for the number from the data PDU that receives about the UE mistake of the status PDU indication of UE that each self-corresponding RLC entity of logic channel DCCH and DTCH receives is merged, and
The data PDU number that receives with the mistake after the described merging and in the described time period on described DCCH and DTCH total data PDU number that sends as information about UE side data PDU reception correctness.
4. according to claim 2 or 3 described methods, wherein said statistic procedure is determined down link block error rate BLER value according to following formula:
BLER(k)＝M/N
Wherein, M is the number of the data PDU that receives of the mistake of the DCCH of this UE in the described time period and/or DTCH, and N be the DCCH of this UE of total transmission in the described time period and/or the number of DTCH data PDU.
5. method according to claim 4 also comprises the step of described down link BLER value being carried out smothing filtering according to following formula:
BLER
ave(k)＝a·BLER
ave(k-1)+(1-a)·BLER(k)，
Wherein, a is the smoothing filter coefficient, and its span is between 0-1.
6. method according to claim 1, correct reception and the wrong data PDU number that receives from the status PDU indication of UE that wherein said statistic procedure also comprises statistics DCCH and DTCH at least one corresponding RLC entity receives in the two are with as the information about UE side data PDU reception correctness.
7. method according to claim 6, wherein said sir target value obtain step and obtain k+1 sir target value constantly according to following formula:
In the formula, δ is that loop is adjusted step-length, and K is determined by target BLER:
q
kLogic channel DCCH and the two at least one corresponding RLC entity of DTCH by same UE are derived the correct and wrong data PDU number that receives that each status PDU analysis obtains, wherein when the status PDU indication has a data PDU correctly to be received, qk is taken as-1, when the status PDU indication has a data PDU correctly not received, q
kBe taken as+1.
8. the signal interference ratio sir target value of a downlink common channel open Loop Power control produces system, and this system comprises:
A statistic device, be arranged in radio network controller (RNC), be used for adding up that the corresponding wireless chain control layer RLC entity of the logic channel that is carried on the Common transport channel: Dedicated Control Channel DCCH and Dedicated Traffic Channel DTCH the two at least one receives from the status protocol data cell PDU indication of user equipment (UE) receives the information of correctness about UE side data PDU; And
A sir target value trace loop is exported the sir target value that is used for the down link open Loop Power control according to described information about UE side data PDU reception correctness.
9. system according to claim 8, the data PDU number that receives about the UE mistake that wherein said statistic device is used for that statistic logic channel DCCH and the two at least one corresponding RLC entity of DTCH receive in a period of time from the status PDU indication of UE; And the data PDU number that the UE mistake that described statistic device obtains with described statistics receives and in the described time period described DCCH and DTCH in the two at least one total data PDU number that sends as information, in order to import described sir target value trace loop about UE side data PDU reception correctness.
10. system according to claim 8, described statistic device comprises that also merges a device, be used for the number from the data PDU that receives about the UE mistake of the status PDU indication of UE that each self-corresponding RLC entity of logic channel DCCH and DTCH receives is merged, the data PDU number that receives with the mistake after the described merging and in the described time period on described DCCH and DTCH total data PDU number that sends as information, in order to import described sir target value trace loop about UE side data PDU reception correctness.
11. according to claim 9 or 10 described systems, wherein said statistic device is determined down link block error rate BLER value according to following formula:
BLER(k)＝M/N
Wherein, M is the number of the data PDU that receives of the mistake of the DCCH of this UE in the described time period and/or DTCH, and N be the DCCH of this UE of total transmission in the described time period and/or the number of DTCH data PDU.
12. system according to claim 11, wherein said statistic device also carries out smothing filtering according to following formula to described down link BLER value:
BLER
ave(k)＝a·BLER
ave(k-1)+(1-a)·BLER(k)，
Wherein, a is the smoothing filter coefficient, and its span is between 0-1.
13. system according to claim 8, correct reception and the wrong data PDU number that receives that wherein said statistic device is used for also that the two at least one corresponding RLC entity of statistic logic channel DCCH and DTCH receives from the status PDU indication of UE, as the information that receives correctness about UE side data PDU, in order to import described sir target value trace loop.
14. system according to claim 13, wherein said sir target value trace loop obtains k+1 sir target value constantly according to following formula:
In the formula, δ is that loop is adjusted step-length, and K is determined by target BLER:
q
kBy the logic channel DCCH of same UE and the two at least one corresponding RLC entity of DTCH the correct and wrong data PDU number that receives that each status PDU analysis obtains is derived, wherein indicate when having a data PDU correctly to be received q when status PDU
kBe taken as-1, when the status PDU indication has a data PDU correctly not received, q
kBe taken as+1.
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| PCT/CN2003/000554 WO2005006587A1 (en) | 2003-07-11 | 2003-07-11 | The method and system for confirming the target signal to interference radio of downlink common channel power control |
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|---|---|---|---|---|
| JP4938030B2 (en) | 2006-01-20 | 2012-05-23 | サムスン エレクトロニクス カンパニー リミテッド | Method and apparatus for open loop power control in frequency division multiple access system |
| DE102006011581B4 (en) | 2006-03-10 | 2016-04-28 | Kennametal Widia Produktions Gmbh & Co. Kg | Cutting insert and milling tool |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198274A (en) * | 1996-06-27 | 1998-11-04 | Ntt移动通信网株式会社 | Transmitted power controller |
| CN1254222A (en) * | 1998-11-12 | 2000-05-24 | 日本电气株式会社 | Transmitting power control method of code-division multiple address communication system and its system |
| CN1304586A (en) * | 1998-04-07 | 2001-07-18 | 艾利森电话股份有限公司 | Downlink power control in cellular mobile radio communications system |
| CN1416623A (en) * | 2000-01-12 | 2003-05-07 | 艾利森电话股份有限公司 | Mobile station assisted forward link transmission power and data rate control in CDMA system |
| CN1426172A (en) * | 2001-12-12 | 2003-06-25 | 华为技术有限公司 | Method for controlling downward special physical channel power under compressed mode |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6101179A (en) * | 1997-09-19 | 2000-08-08 | Qualcomm Incorporated | Accurate open loop power control in a code division multiple access communication system |
-
2003
- 2003-07-11 CN CNB038266989A patent/CN100413222C/en not_active Expired - Fee Related
- 2003-07-11 WO PCT/CN2003/000554 patent/WO2005006587A1/en active Application Filing
- 2003-07-11 AU AU2003255074A patent/AU2003255074A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1198274A (en) * | 1996-06-27 | 1998-11-04 | Ntt移动通信网株式会社 | Transmitted power controller |
| CN1304586A (en) * | 1998-04-07 | 2001-07-18 | 艾利森电话股份有限公司 | Downlink power control in cellular mobile radio communications system |
| CN1254222A (en) * | 1998-11-12 | 2000-05-24 | 日本电气株式会社 | Transmitting power control method of code-division multiple address communication system and its system |
| CN1416623A (en) * | 2000-01-12 | 2003-05-07 | 艾利森电话股份有限公司 | Mobile station assisted forward link transmission power and data rate control in CDMA system |
| CN1426172A (en) * | 2001-12-12 | 2003-06-25 | 华为技术有限公司 | Method for controlling downward special physical channel power under compressed mode |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003255074A1 (en) | 2005-01-28 |
| CN1788428A (en) | 2006-06-14 |
| WO2005006587A1 (en) | 2005-01-20 |
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